Recently had a new Zenmuse H3-3D gimbal fitted and upgraded to the current transmitter. It is the original P2 which came with the transmitter that had the gimbal control on the back. When i am flying the P2 keeps going into failsafe mode and returns to home. It doesn't even let me recover by switching to Atti mode. I have noticed a few times that when I go to start up the transmitter needs to be paired up again using the red/green button underneath. I am desperate to get this right as we have a job overseas on Tuesday and had planned to take the P2 with us. Has anyone else had the same problem and could point us in the right direction please? The compass has been calibrated, the battery is fully charged and as far as I'm aware all the software is up to date. HELP!